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PatchSiren cyber security CVE debrief

CVE-2026-41715 Spring CVE debrief

CVE-2026-41715 is a medium-severity vulnerability (CVSS Score: 6.1) affecting Reactor Netty's HTTP client. In specific scenarios involving HTTP redirects from a secure to an insecure endpoint, the Reactor Netty HTTP client may leak credentials. This can occur only when the HTTP client has been explicitly configured to follow redirects. Affected versions include Reactor Netty 1.0.0 through 1.0.51, 1.1.0 through 1.1.35, 1.2.0 through 1.2.17, and 1.3.0 through 1.3.5.

Vendor
Spring
Product
Reactor Netty
CVSS
MEDIUM 6.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-23
Advisory published
2026-06-09
Advisory updated
2026-06-23

Who should care

Users of Reactor Netty, particularly those who have explicitly configured their HTTP client to follow redirects, should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability arises from Reactor Netty's handling of HTTP redirects. When the client is configured to follow redirects and encounters a redirect from a secure to an insecure endpoint, it may inadvertently leak credentials.

Defensive priority

Medium

Recommended defensive actions

  • Update to a non-vulnerable version of Reactor Netty.
  • Review and adjust HTTP client configurations to avoid following redirects to insecure endpoints.

Evidence notes

The CVE record and details are sourced from official databases and vendor notifications.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-41715 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-41715

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-41715 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-41715

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.